Autocomplete doesn't correct camel casing mid-word.

[farmdawgnation]

There appears to be a bug in how auto complete handles mid word fill-ins, specifically that it doesn't seek back and correct case errors.

For example, assume I have defined a variable earlier named awesomeBaconSammich. Later in the file I start typing awesomeba and autocomplete correctly suggests awesomeBaconSammich. However, when I select that item from the autocomplete drop down the text awesomebaconSammich is what actually appears.

[Shadowfiend]

Likely reason here is that when we select a completion, rather than replacing the full range with the selected completion, we fill in the untyped part based on the selection. Can't say off the top of my head whether or not this'll be easy to fix with the modality of the completion left as it currently is, but it's likely the fix for this will live around ViCompletionController.m:405, in acceptByKey:.